1. Title 49, Transportation and railroads, chap. 1, Interstate Commerce Commission, subchap. A, General rules and regulations, pt. 133, Signal, interlocking, train-control, and train-order statistics; Annual report of block-signal, interlocking, automatic train-stop, train-control and cab-signal, centralized traffic control, spring switch and train-order and train-communication statistics. Bookmark Corporate/Agency Authors: Interstate Commerce Commission Publisher: Interstate Commerce Commission Date: [1948.] SuDoc number: IC 1 blo.2:R 29/948